l blue-host: add start/stop scripts

lass/2configs/blue-host.nix

@@ -20,4 +20,23 @@ with import <stockholm/lib>;
     hostAddress = "10.233.2.9";
     localAddress = "10.233.2.10";
   };
+  environment.systemPackages = [
+    (pkgs.writeDashBin "start-blue" ''
+      set -ef
+      if ping -c1 blue.r; then
+        echo 'blue is already running. bailing out'
+        exit 23
+      fi
+      if ! $(mount | ${pkgs.gnugrep}/bin/grep -qi '^encfs on /var/lib/containers/blue'); then
+        ${pkgs.encfs}/bin/encfs --public /var/lib/containers/.blue /var/lib/containers/blue
+      fi
+      nixos-container start blue
+      nixos-container run blue -- nixos-rebuild -I /var/src switch
+    '')
+    (pkgs.writeDashBin "stop-blue" ''
+      set -ef
+      nixos-container stop blue
+      fusermount -u /var/lib/containers/blue
+    '')
+  ];
 }